At this point the dragon can choose to allow the body to die, or it can keep it alive by sheer mental strength. There are advantages to both. If the Air Dragon chooses to keep the body alive, his Air Dragon form cannot be completely destroyed. No matter how much damage it may take, it can still reform elsewhere within 1d4 turns. However, the Air Dragon body can never get farther that 15,000 miles from its living real-body husk. As long as the body is not slain, the dragon lives forever.
If the Air Dragon chooses to allow the physical body to die, the dragon has no limitations in where they can choose to go. These Coliar Air Dragons have been seen on other planets and even in other crystal spheres. They do, however run the risk of dying should their air dragon body be destroyed.